package com.wuji1626.spark.rdd.transform

import org.apache.spark.{SparkConf, SparkContext}

object RDD_Transform_sample {

  def main(args: Array[String]): Unit = {
    // Step1: 准备环境
    val sparkConf = new SparkConf().setMaster("local[*]").setAppName("Operator")
    val sc = new SparkContext(sparkConf)
    // Step2: 算子 filter
    val rdd = sc.makeRDD(List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
    println(rdd.sample(
      withReplacement = false,
      0.4
//      ,1
    ).collect().mkString(","))

    // Step3: 关闭环境
    sc.stop()
  }

}
